MESON Chess Problem Database

Problem Display
PID: 55167 (1B3Q2/1pN5/2pP3K/4q1p1/N2kP1R1/1P4P1/2P1R3/3n4 w - - 0 1)

Mansfield, Comins

3rd Prize, Yugoslav Ring Ty., 1971-1972

1B3Q2/1pN5/2pP3K/4q1p1/N2kP1R1/1P4P1/2P1R3/3n4

#2

12 + 6

2872 Delo in Tovaris 1971
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6+
      • 2.Qxd6#
    • 1...Qf6+
      • 2.Qxf6#
    • 1...Qg7+
      • 2.Qxg7#
    • 1...Qh8+
      • 2.Qxh8#
    • 1...Qxe4
      • 2.Rexe4#
      • 2.Rgxe4#
      • 2.Qg7#
      • 2.Qf6#
      • 2.Qh8#
    • 1...Qa5
      • 2.e5#
    • 1...Qb5
      • 2.e5#
    • 1...Qc5
      • 2.e5#
    • 1...Qd5
      • 2.exd5#
    • 1...Qf5
      • 2.exf5#
    • 1...Qe7
      • 2.e5#
    • 1...Qe8
      • 2.e5#
    • 1...Sb2
      • 2.Qf2#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sc3
      • 2.Qf2#
    • 1...Se3
      • 2.Rd2#
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Ba7+?
      • 1...Qc5
        • 2.Qg7#
        • 2.Qf6#
        • 2.Qh8#
        • 2.e5#
      • 1...c5
        • 2.Sb5#
      • 1...b6!
    • 1.Qg7?
      • threat
        • 2.Se6#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qxg7+!
    • 1.Qf2+?
      • 1...Se3
        • 2.Rd2#
        • 2.Qxe3#
      • 1...Sxf2!
    • 1.Qh8?
      • threat
        • 2.Se6#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+!
  • Keys
    • 1.d7!
      • threat
        • 2.Qb4#
      • 1...Qd6+
        • 2.Qxd6#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qh8+
        • 2.Qxh8#
      • 1...Qe6+
        • 2.Sxe6#
      • 1...Qxg3
        • 2.Se6#
        • 2.Qc5#
      • 1...Qxc7
        • 2.Qc5#
      • 1...Qxe4
        • 2.Rexe4#
        • 2.Rgxe4#
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qg7#
        • 2.Qf6#
        • 2.Qh8#
      • 1...Qf4
        • 2.Se6#
        • 2.Qc5#
      • 1...Qa5
        • 2.Se6#
        • 2.e5#
      • 1...Qb5
        • 2.Se6#
        • 2.e5#
      • 1...Qc5
        • 2.Se6#
        • 2.Qxc5#
        • 2.e5#
      • 1...Qd5
        • 2.exd5#
      • 1...Qf5
        • 2.exf5#
      • 1...Qe7
        • 2.e5#
      • 1...Qe8
        • 2.Qc5#
        • 2.Qd6#
        • 2.e5#
      • 1...Sb2
        • 2.Qf2#
      • 1...Se3
        • 2.Rd2#
      • 1...c5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(c);CHECK,OGATE,XP(H)::QAR2(L),XQ(c)
    • Q(c);CHECK,OGATEB::QAB(L),XQ(c)
    • Q(c);OGATE::R(G)+P(F)
    • Q(c);OGATE::R(G)+P(F),XQ(c)
    • S(a);N_GUARD::QAB(L)
    • S(a);N_GUARD::QAB(L),XS(a)
    • S(a);SBLOCK::R(B)
    • P(e);N_GUARD,S_CUTQ(c)::S(J)
  • Tries
    • Try
      • B(K);CHECK
      • Vars
        • P(e);P_SPINP(e)::S(J)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(L);P_PINQ(c)
      • Threat
        • S(J)
      • Vars
        • Q(c);CHECK,OGATEB::QAB(L),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(L)
    • Try
      • Q(L);CHECK
      • Refutation
        • S(a);XQ(L)
    • Try
      • Q(L);P_PINQ(c)
      • Threat
        • S(J)
      • Vars
        • Q(c);CHECK,OGATEB::QAB(L),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(L)
  • Actual
    • P(H);
    • Threat
      • QAR2(L)
    • Vars
      • Q(c);CHECK,N_GUARD::QAR2(L),XQ(c)
      • Q(c);CHECK,OGATEB::QAB(L),XQ(c)
      • Q(c);CHECK,N_GUARD::S(J),XQ(c)
      • Q(c);N_GUARD,XS(J)::QAB1(L)
      • Q(c);OGATE::R(G)+P(F),XQ(c)
      • Q(c);OGATE::R(G)+P(F)
      • S(a);N_GUARD::QAB(L)
      • S(a);SBLOCK::R(B)
      • P(e);N_GUARD,S_CUTQ(c)::S(J)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).